Automatically-operating door.



Patentedl Abr. 29, 1902.

J. H. WHHAKER. AUTMATCALLY OPERATING DOOR.

(Applimion med Feb. 5, 1901.)

(Nu Modem fL/w. @M

SPECIFICATION forming part of Leiters Lbate'n't No, 693,385', dated April 29, 1962.

Application filed February 5. i.

To all whom, it' T11/ay concorre: l

Be it known that I, JOHN H. W'HITAKER. a citizen of the United States of America, and a resident of Davenport, in the county of Scott and State of iowa, have invented cer tain new and useful Improvements in Automatically-Operating Doors; and I do declare the following specification, taken in connection with the drawings making a part of the same, to be a full, clear, and e.\:act descrip tion thereof.

This invention relates to devices for operating doors automatically, and is especially useful when connected with a door between i dining-room and kitchen, Where the advanl tage of being, alole to open a door without i using the hands Will be apparent. l

The object of J[his invention is to cause a I door to which my device is attached to be opened automatically when a plate siightly elevated above the door and operatively con nected with mechanism located below the floor is depressed, thus enabling a person to i pass through such doorway and to cause such opened door to close automatically when the person has passed through the doorway and I when the pressure o'n the plate has been f leased. l

A further object is to simplify and improve l the mechanism shown and described in my l previous patents of record.

Figure lis a front elevation of a door to l which my invention is connected and atg tached. Fig. 2 is an enlarged detail View of l the tread-button or platecmechanism from thesidoindicatedliythoarrowin Fig. l. nig. I 3 shows about the angle of the counectiiig-len ver with reference to tl1ctrQadmt-ton and the i vertical engaging rod, hereinafter described. I

In the drawings, l represents the door-line. 2 is the door, which has secured to its top oy I suitable brackets the rollers 3. These roll i ers are mounted to run upon the rail To the rear edge ol' the door l secure an oiln l chamber, iu'whicli is placed a pistoirrod having` a plunger at its lower end, which in the operation of my invention serves as a cushion t0 avoid sudden jarring when the door reaches its open or closed' position and to retard the movement of the door when near its open or closed position. An angular weighted arm 5, pivoted to a brace secured to the Wall or projecting a lever-arm located underneath serial no. 46,070. @To man.;

o necting the pivoted arm with the pistorurod in the cylinder are used in this improvement; but as these parte are in all respects substantially the same as shown and described in my atcnt No. 532,299, September 5, 1899, to which reference is made, a further description thereof will be unnecessary. f

5 represents a short arm whicherztends inwardly at right angles from the anguiar arm 5 at a. point adjacent to Where it is ifi y oted to the brace and is preferably madefin tegraiwith the arm 5. y, Y

6 is a vertical.` rod, its upper end adagio@ to he looselyv connected with the end. of the 5 and passing through. the

fico? l. the floor and hr 8, which may i any other suite the door. @ne .end ci' loosely connected with the lower end of the vertical rod G, and it extends from that connection to a point which the of t"e post i0.

represents the guide-plate, into door so that the top or" duch with the top ci said plate.

its inici-urn in a hearing; e secured the fio le Said plate is provided Wi h two downWardly-projecting ears lL and li", notched! to receive the hooks illiand 12') of the connecting-piatte l l. Saidcon- Erecting-plaie l2 consists of i'lat rectangular plate with a cen trai opening provided with iour hooks, one

12C, and l2",`) the last-named each corner, (designated nook iidn, 12', notbeingshou'n hutten 13 is incr plate l and f provideL rubber i3 and lil", secured in enf 33.34 ot' such hutten. Prodccting' downirardiy from he trebutton 323 at its corners pyosiic to the ears llllv and ll` are two similar notched ears, one of which in Fig. 2, (marked 1250,) and the hooks i2@ and 12d cf the hinge-plaie rest in `such notches. Frojecting downwardly rom'the center of the under side oi' the tread-hutten asociet 13, which receives the upperend ci' the joost l0. It will he seen that hytiiis form "tread-button mechanism the nlace of contact with the tread-hutten is immaterial to its succcssiul operation. The; late boing contherwise, and upper arm operatively conto a bloei; 9 'er in I le manner just nnderneetir such lever-arm is .K

is vertically below IOO .so l

' A 'shorter member, said'rod extending through nected with both the tread-button and the guide-plate will prevent binding and friction between the parts.

By stepping upon the tread-button at any point it will be depressed in a true vertical line,and the post being connected with one end of the fulcrumed lever-arm 7 will cause the other end thereof to be raised.- 'This will elevate the vertical rod, 6 and through its connection with the short arm 5a of the angular pivoted arm 5 said angular arm will swing on its pivot. This will draw the door 2 backward and open. WVhen the pressure has been released from the tread-button 13, the weight at the bottom of the angular arm 5 willcause said arm to swing back to its normal position, and this action will close the door.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. In an automatically-operating door, the combination ofa door, a horizontal rail, means for suspending said door from the rail, an angular pivoted arm composedot' three menibers, its vupper member loosely connected Y. with'the rear of the door, its lower member I .provided with a weight, its third and shorter lmember extending inwardly at right angles to, the upper member, a vertical rod whose upper end is loosely connected with said and some distance below'the floor, a leverarm supported and fulcruie'd in a bearing underneath the floor, one end of said leverarm loosely connected with the lower end of the vertical rod; a post whose lower end is Connected with the other end of the leverarm, a tread plate or button slightly raised above the floor and engaging the post for the purposes stated.

2. In an automatically-operating door, the

` combination oa horizontal rail,a` door mounted thereon, guide-rods secured to the rear edge of the door, a roller between saidl guiderods, an angular pivoted arm composed of three members, its lower member provided with a weight, its upper member connected withthe roller, its third and shorter member vextending at right angles to the upper member, a vertical rod whose upper end is loosely connected with said shorter member, said rod extending through andsome distance below the door, a lever-arm supported and fnlcrumed in a bearing underneath the door, one end of said lever-arm loosely connected with the lower end of the vertical rod, an upright post to whose lower end the other end of the lever-arm is loosely connected, a guideplate having two downwardly projecting notched ears, a tread-button adapted to move vertically in said `{snide-plate and provided with similar notched ears,a connecting-plate with four hook-shaped corners, such hooks adapted to rest in the notched ears of the guide-plate and tread-button; the tread-button provided with a central socket on its nnder side to receive the upper endof the up right post for the purposes stated and substantially as described. r I

3. .A tread-button having a central socket on its under side and provided at one edge with two downwardly-projecting notched. 

